<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>float</title>
    <style>@import "CSS/float.css";</style>
</head>
<body>
<div id="container">
    <div id="d1">div 1...</div>
    <div id="d2">div 2...</div>
    <div id="d3">div 3...</div>
    <div class="clear"></div>
</div>
</body>
</html>